The Moon is about 3,470 km, or ≈ 393 Mount Everests. A little over a quarter as wide as Earth. It drifts about 3.8 cm farther away from us every year.

The Moon: how big is it?

The Moon is about 3,470 km. In everyday terms, that is ≈ 393 Mount Everests.

Size: 3,470 km
In metres: 3.47 × 10⁶ m
Everyday comparison: ≈ 393 Mount Everests
Chapter: Countries & Worlds

Did you know?

A little over a quarter as wide as Earth. It drifts about 3.8 cm farther away from us every year.

How it compares

Roughly the same size as India (north to south) (3,210 km).
About 2× smaller than Mars (6,780 km).

See it on the zoom

Other things of a similar size

Ceres 940 km
Pluto 2,380 km
River Ganga 2,530 km
India (north to south) 3,210 km
Mars 6,780 km
Earth 12,700 km

Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.